adonet数据库操作函数库
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李国帅 于2008年收集
sqlClient
Imports System.DataImports System.Data.SqlClientImports System.IOPublic Class CSqlClient Private strConnect As String '连接数据库字符串 Private myConnection As SqlConnection = Nothing 'SqlConnection对象 Private myConnectFlag As Boolean = False '是否连接成功标识 Private strSQL As String 'SQL语句字符串 Public Sub ErrorLog(ByVal e As Exception) Dim strMsg As New StringWriter() strMsg.WriteLine("<Date Time>" & DateTime.Now()) strMsg.WriteLine("Source:" & e.Source) strMsg.WriteLine("Message:" & e.Message) System.Diagnostics.EventLog.WriteEntry("SqlDatabase", strMsg.ToString()) End Sub '连接数据库(Sql Server) Public Function connect(ByRef m_strConnect As String) As Boolean Try strConnect = m_strConnect myConnection = New SqlConnection(strConnect) myConnection.Open() myConnectFlag = True Catch err As Exception ErrorLog(err) End Try Return myConnectFlag End Function '关闭数据库 Public Sub close() If (myConnectFlag) Then myConnection.Close() End If End Sub '获取SqlServer对象 Public Function getConnectSqlServer() As SqlConnection If (myConnectFlag) Then getConnectSqlServer = myConnection End If End Function '创建一个command对象 Public Function CreateCommand(ByRef m_strSQL As String, ByRef m_Param() As SqlParameter, _ ByRef m_SQLCmdType As CommandType) As SqlCommand Dim myCommand As New SqlCommand(m_strSQL, myConnection) myCommand.CommandType = m_SQLCmdType Dim Param As SqlParameter If Not m_Param Is Nothing Then For Each Param In m_Param myCommand.Parameters.Add(Param) Next End If Try Return myCommand Catch err As SqlException ErrorLog(err) Return Nothing End Try End Function '执行SQL语句 Public Overloads Function ExecuteSQL(ByRef m_strSQL As String, ByRef m_DataSet As DataSet) As Boolean Try If (myConnectFlag) Then Dim myDataAdapter As New SqlDataAdapter(m_strSQL, myConnection) myDataAdapter.Fill(m_DataSet) End If Catch err As SqlException ErrorLog(err) Return False End Try End Function Public Overloads Function ExecuteSQL(ByVal m_strSQL As String, ByRef m_DataReader As SqlDataReader) As Boolean Dim myCommand As New SqlCommand(m_strSQL, myConnection) Try m_DataReader = myCommand.ExecuteReader() Return True Catch err As SqlException ErrorLog(err) Return False End Try End Function '执行存储过程 Public Overloads Function ExecuteSP(ByRef m_SProcName As String, ByRef m_Param() As SqlParameter, ByRef m_DataSet As DataSet) As Boolean Dim myCommand As SqlCommand = CreateCommand(m_SProcName, m_Param, CommandType.StoredProcedure) Dim myDataAdapter As New SqlDataAdapter(myCommand) Try myDataAdapter.Fill(m_DataSet) Return True Catch err As SqlException ErrorLog(err) Return False End Try End Function Public Overloads Function ExecuteSP(ByRef m_SProcName As String, ByRef m_Param() As SqlParameter) As Boolean Dim myCommand As SqlCommand = CreateCommand(m_SProcName, m_Param, CommandType.StoredProcedure) Try myCommand.ExecuteNonQuery() Return True Catch err As SqlException ErrorLog(err) Return False End Try End Function Public Overloads Function ExecuteSP(ByRef m_SProcName As String, ByRef m_Param() As SqlParameter, ByRef m_DataReader As SqlDataReader) As Boolean Dim myCommand As SqlCommand = CreateCommand(m_SProcName, m_Param, CommandType.StoredProcedure) Try m_DataReader = myCommand.ExecuteReader Return True Catch err As SqlException ErrorLog(err) Return False End Try End Function '############################################################################################ '获取数据库的表名 Public Function getTables(ByRef m_TablesDataSet As DataSet) As Boolean Dim myTablesDataSet As New DataSet() Dim myDataReader As SqlDataReader Dim mySuccessFlag As Boolean = False Try If (myConnectFlag) Then Dim SuccessFlag As Boolean = False SuccessFlag = myTables(myDataReader) If (SuccessFlag) Then Dim myArrayList As ArrayList = New ArrayList() While (myDataReader.Read()) Dim myTableName As String = "" myTableName = CType(myDataReader.GetValue(0), String) myArrayList.Add(myTableName) End While myDataReader.Close() Dim iArrayCount As Integer = myArrayList.Count Dim myTableArray(iArrayCount) As String myArrayList.CopyTo(myTableArray) Dim i As Integer For i = 0 To iArrayCount - 1 Dim tblName As String tblName = myTableArray(i) strSQL = "sp_help " & "[" & tblName & "]" Dim myCommand As New SqlCommand(strSQL, myConnection) Dim myDataAdapter As New SqlDataAdapter(myCommand) myDataAdapter.Fill(myTablesDataSet, tblName) Next End If m_TablesDataSet = myTablesDataSet mySuccessFlag = True End If Catch e As SqlException Console.WriteLine(e.ToString()) End Try m_TablesDataSet = myTablesDataSet Return mySuccessFlag End Function Private Function myTables(ByRef myDataReader As SqlDataReader) As Boolean Dim mySuccessFlag As Boolean = False Dim myLocalDataReader As SqlDataReader Try If (myConnectFlag) Then strSQL = "SELECT Name FROM SysObjects WHERE Type='U'" Dim myCommand As New SqlCommand(strSQL, myConnection) myLocalDataReader = myCommand.ExecuteReader(CommandBehavior.SingleResult) mySuccessFlag = True End If Catch e As SqlException Console.WriteLine(e.ToString()) End Try myDataReader = myLocalDataReader Return mySuccessFlag End Function '获取数据库的视图名 Public Function getViews(ByRef m_TablesDataSet As DataSet) As Boolean Dim myTablesDataSet As New DataSet() Dim myDataReader As SqlDataReader Dim mySuccessFlag As Boolean = False Try If (myConnectFlag) Then Dim SuccessFlag As Boolean = False SuccessFlag = myViews(myDataReader) If (SuccessFlag) Then Dim myArrayList As ArrayList = New ArrayList() While (myDataReader.Read()) Dim myTableName As String = "" myTableName = CType(myDataReader.GetValue(0), String) myArrayList.Add(myTableName) End While myDataReader.Close() Dim iArrayCount As Integer = myArrayList.Count Dim myTableArray(iArrayCount) As String myArrayList.CopyTo(myTableArray) Dim i As Integer For i = 0 To iArrayCount - 1 Dim tblName As String tblName = myTableArray(i) strSQL = "sp_help " & "[" & tblName & "]" Dim myCommand As New SqlCommand(strSQL, myConnection) Dim myDataAdapter As New SqlDataAdapter(myCommand) myDataAdapter.Fill(myTablesDataSet, tblName) Next End If m_TablesDataSet = myTablesDataSet mySuccessFlag = True End If Catch e As SqlException Console.WriteLine(e.ToString()) End Try m_TablesDataSet = myTablesDataSet Return mySuccessFlag End Function Private Function myViews(ByRef myDataReader As SqlDataReader) As Boolean Dim mySuccessFlag As Boolean = False Dim myLocalDataReader As SqlDataReader Try If (myConnectFlag) Then strSQL = "SELECT * FROM SysObjects WHERE Type='V'" Dim myCommand As New SqlCommand(strSQL, myConnection) myLocalDataReader = myCommand.ExecuteReader(CommandBehavior.SingleResult) mySuccessFlag = True End If Catch e As SqlException Console.WriteLine(e.ToString()) End Try myDataReader = myLocalDataReader Return mySuccessFlag End Function '获取数据库的存储过程名 Public Function getStoredProcs(ByRef m_TablesDataSet As DataSet) As Boolean Dim myTablesDataSet As New DataSet() Dim myDataReader As SqlDataReader Dim mySuccessFlag As Boolean = False Try If (myConnectFlag) Then Dim SuccessFlag As Boolean = False SuccessFlag = myStoredProcs(myDataReader) If (SuccessFlag) Then Dim myArrayList As ArrayList = New ArrayList() While (myDataReader.Read()) Dim myTableName As String = "" myTableName = CType(myDataReader.GetValue(0), String) myArrayList.Add(myTableName) End While myDataReader.Close() Dim iArrayCount As Integer = myArrayList.Count Dim myTableArray(iArrayCount) As String myArrayList.CopyTo(myTableArray) Dim i As Integer For i = 0 To iArrayCount - 1 Dim tblName As String tblName = myTableArray(i) strSQL = "sp_help " & "[" & tblName & "]" Dim myCommand As New SqlCommand(strSQL, myConnection) Dim myDataAdapter As New SqlDataAdapter(myCommand) myDataAdapter.Fill(myTablesDataSet, tblName) Next End If m_TablesDataSet = myTablesDataSet mySuccessFlag = True End If Catch e As SqlException Console.WriteLine(e.ToString()) End Try m_TablesDataSet = myTablesDataSet Return mySuccessFlag End Function Private Function myStoredProcs(ByRef myDataReader As SqlDataReader) As Boolean Dim mySuccessFlag As Boolean = False Dim myLocalDataReader As SqlDataReader Try If (myConnectFlag) Then strSQL = "SELECT * FROM SysObjects WHERE Type='P'" Dim myCommand As New SqlCommand(strSQL, myConnection) myLocalDataReader = myCommand.ExecuteReader(CommandBehavior.SingleResult) mySuccessFlag = True End If Catch e As SqlException Console.WriteLine(e.ToString()) End Try myDataReader = myLocalDataReader Return mySuccessFlag End FunctionEnd Class
oledbClient
Imports SystemImports System.DataImports System.Data.OleDbPublic Class OleDatabase '类成员声明 Public Connection As OleDbConnection 'OleDbConnection对象 Public Adapter As OleDbDataAdapter 'OleDbDataAdapter对象 Public Command As OleDbCommand Public CommandBuilder As OleDbCommandBuilder Public SelectCommand As OleDbCommand Public InsertCommand As OleDbCommand Public UpdateCommand As OleDbCommand Public DeleteCommand As OleDbCommand Protected ConnString As String '显示错误信息 Public Sub DisplayError(ByVal ex As Exception) MsgBox("模块：" & ex.Source & "出现错误" & Chr(10) & Chr(13) & "错误信息：" & ex.Message) End Sub '更新数据集(DataSet)、数据表(DataTable)、或数据行(DataRow()) Public Function UpDate(ByRef Data As Object) As Boolean Dim succ As Boolean = True Try CommandBuilder.DataAdapter = Adapter CommandBuilder.RefreshSchema() Adapter.Update(Data) Catch ex As Exception succ = False End Try UpDate = succ End Function '执行SELECT SQL语句，并返回OleDbDataReader对象 '函数成功返回True，失败返回False Public Function SelectQuery(ByVal SelectString As String, ByRef DataReader As OleDbDataReader) As Boolean Dim ret As Boolean = True Try If Connection.State = ConnectionState.Closed Then Connection.Open() End If Command.CommandText = SelectString Command.CommandType = CommandType.Text Adapter.SelectCommand = Command DataReader = Command.ExecuteReader(CommandBehavior.CloseConnection) Catch ex As Exception ret = False DisplayError(ex) End Try SelectQuery = ret End Function '执行SELECT SQL语句,成功返回受影响的行数,失败返回-1 Public Function SelectQuery(ByVal SelectString As String) As Integer Dim ret As Integer Try If Connection.State = ConnectionState.Closed Then Connection.Open() End If Command.CommandText = SelectString Command.CommandType = CommandType.Text Adapter.SelectCommand = Command ret = Command.ExecuteNonQuery() Catch ex As Exception ret = -1 DisplayError(ex) Finally Connection.Close() End Try SelectQuery = ret End Function '执行SELECT 存储过程，并填充一个已经new过的数据集对象 '函数成功返回True，失败返回False Public Function SelectSP(ByVal SPName As String, ByRef SelectData As Object) As Boolean Dim ret As Boolean = True Try If Connection.State = ConnectionState.Closed Then Connection.Open() End If Command.CommandText = SPName Command.CommandType = CommandType.StoredProcedure Adapter.SelectCommand = Command Adapter.Fill(SelectData) Catch ex As Exception ret = False DisplayError(ex) Finally Connection.Close() End Try SelectSP = ret End Function Public Function SelectSP(ByVal SPName As String, ByRef DataReader As OleDbDataReader) As Boolean Dim ret As Boolean = True Try If Connection.State = ConnectionState.Closed Then Connection.Open() End If Command.CommandText = SPName Command.CommandType = CommandType.StoredProcedure Adapter.SelectCommand = Command DataReader = Command.ExecuteReader() Catch ex As Exception ret = False DisplayError(ex) Finally Connection.Close() End Try SelectSP = ret End Function '执行UPDATE 存储过程 '函数成功返回True，失败返回False Public Function UpdateSP(ByVal SPName As String) As Boolean Dim ret As Boolean = True Try If Connection.State = ConnectionState.Closed Then Connection.Open() End If Command.CommandText = SPName Command.CommandType = CommandType.StoredProcedure Adapter.UpdateCommand = Command Command.ExecuteNonQuery() Catch ex As Exception ret = False DisplayError(ex) Finally Connection.Close() End Try UpdateSP = ret End Function '执行DELETE 存储过程 '函数成功返回True，失败返回False Public Function DeleteSP(ByVal SPName As String) As Boolean Dim ret As Boolean = True Try If Connection.State = ConnectionState.Closed Then Connection.Open() End If Command.CommandText = SPName Command.CommandType = CommandType.StoredProcedure Adapter.DeleteCommand = Command Command.ExecuteNonQuery() Catch ex As Exception ret = False DisplayError(ex) Finally Connection.Close() End Try DeleteSP = ret End Function '执行INSERT 存储过程 '函数成功返回True，失败返回False Public Function InsertSP(ByVal SPName As String) As Boolean Dim ret As Boolean = True Try If Connection.State = ConnectionState.Closed Then Connection.Open() End If Command.CommandText = SPName Command.CommandType = CommandType.StoredProcedure Adapter.InsertCommand = Command Command.ExecuteNonQuery() Catch ex As Exception ret = False DisplayError(ex) Finally Connection.Close() End Try InsertSP = ret End Function '执行DELETE SQL语句 '函数执行完之后，数据库连接自动关闭，不要再调用CloseConnection()接口 '函数成功返回True，失败返回False Public Function DeleteQuery(ByVal DeleteString As String) As Boolean Dim ret As Boolean = True Try If Connection.State = ConnectionState.Closed Then Connection.Open() End If Command.CommandText = DeleteString Command.CommandType = CommandType.Text Adapter.DeleteCommand = Command Command.ExecuteNonQuery() Catch ex As Exception ret = False DisplayError(ex) Finally Connection.Close() End Try DeleteQuery = ret End Function '执行UPDATE SQL语句 '函数执行完之后，数据库连接自动关闭，不要再调用CloseConnection()接口 '函数成功返回True，失败返回False Public Function UpdateQuery(ByVal UpdateString As String) As Boolean Dim ret As Boolean = True Try If Connection.State = ConnectionState.Closed Then Connection.Open() End If Command.CommandText = UpdateString Command.CommandType = CommandType.Text Adapter.UpdateCommand = Command Command.ExecuteNonQuery() Catch ex As Exception ret = False DisplayError(ex) Finally Connection.Close() End Try UpdateQuery = ret End Function '执行INSERT SQL语句 '函数执行完之后，数据库连接自动关闭，不要再调用CloseConnection()接口 '函数成功返回True，失败返回False Public Function InsertQuery(ByVal InsertString As String) As Boolean Dim ret As Boolean = True Try If Connection.State = ConnectionState.Closed Then Connection.Open() End If Command.CommandText = InsertString Command.CommandType = CommandType.Text Adapter.InsertCommand = Command Command.ExecuteNonQuery() Catch ex As Exception ret = False DisplayError(ex) Finally Connection.Close() End Try InsertQuery = ret End Function '执行SELECT SQL语句，并填充一个已经new过的数据集对象 '函数执行完之后，数据库连接自动关闭，不要再调用CloseConnection()接口 '如果查询成功返回True,否则返回False Public Function SelectQuery(ByVal SelectString As String, ByRef SelectData As Object) As Boolean Dim ret As Boolean = True Try If Connection.State = ConnectionState.Closed Then Connection.Open() End If Command.CommandText = SelectString Command.CommandType = CommandType.Text Adapter.SelectCommand = Command Adapter.Fill(SelectData) Catch ex As Exception ret = False DisplayError(ex) Finally Connection.Close() End Try SelectQuery = ret End Function '连接到DB2数据库 'Server ---- 服务器地址或名称 'DbName ----- 要连接到的数据库名称 'UserId ---- 用户名 'Password ---- 登录口令 Public Function Db2Connection(ByVal Server As String, ByVal DbName As String, ByVal UserId As String, ByVal Password As String) As Boolean Dim ret As Boolean = True '如果数据库连接没有打开，尝试打开数据库连接 If Connection.State = ConnectionState.Closed Then '构造连接字串 ConnString = "Provider=IBMDADB2.1;Mode=ReadWrite;UID=" & _ UserId & ";PWD=" & Password & ";Data Source=" & DbName & _ ";Location=" & Server Try Connection.ConnectionString = ConnString Connection.Open() Catch ex As Exception ret = False DisplayError(ex) End Try End If Db2Connection = ret '返回函数结果 End Function '关闭数据库连接 Public Function CloseConnection() If Connection.State = ConnectionState.Open Then Try Connection.Close() '关闭数据库连接 Catch ex As Exception DisplayError(ex) End Try End If End Function '接口CreateConnection ----- 创建数据库连接,自定义连接字串，可连接各种数据库 'connString ----- 连接字串 '成功返回 True，否则返回 False Public Function CreateConnection(ByVal ConnectionString As String) As Boolean Dim ret As Boolean = True ConnString = ConnectionString '如果数据库连接没有打开，尝试打开数据库连接 If Connection.State = ConnectionState.Closed Then Try Connection.ConnectionString = ConnectionString Connection.Open() Catch ex As Exception ret = False DisplayError(ex) End Try End If CreateConnection = ret '返回函数结果 End Function '接口AccessConnection ----- 连接到Access数据库 'DbPath ---- 数据库完整路径 'UserId ---- 用户名 'Passord ----- 用户密码 '成功返回 True，否则返回 False Public Function AccessConnection(ByVal DbPath As String, ByVal UserId As String, ByVal Password As String) As Boolean Dim ret As Boolean = True '如果数据库连接没有打开，尝试打开数据库连接 If Connection.State = ConnectionState.Closed Then '构造连接字串 ConnString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & _ DbPath & ";User Id=" & UserId & ";Password=" & Password & ";" Try Connection.ConnectionString = ConnString Connection.Open() Catch ex As Exception ret = False DisplayError(ex) End Try End If AccessConnection = ret '返回函数结果 End Function '接口SqlConnection ----- 连接到SQL Server数据库(通过用户名和密码登录） 'DbName ---- 数据库名 'UserId ---- 用户名 'Passord ----- 用户密码 'DataSource ----- 要连接的SQL实例的名字或者网络地址 '如果是网络地址，IP地址后要加个端口号，如:190.190.200.100,1433,SQL缺省的端口号为1433 '成功返回 True，否则返回 False Public Function SqlConnection(ByVal DataSource As String, ByVal DbName As String, ByVal UserId As String, ByVal Password As String) As Boolean Dim ret As Boolean = True '如果数据库连接没有打开，尝试打开数据库连接 If Connection.State = ConnectionState.Closed Then '构造连接字串 ConnString = "Provider=SQLOLEDB.1;Initial Catalog=" & _ DbName & ";Data Source=" & DataSource & ";User Id=" & UserId & _ ";Password=" & Password & ";" Try Connection.ConnectionString = ConnString Connection.Open() Catch ex As Exception ret = False DisplayError(ex) End Try End If SqlConnection = ret '返回函数结果 End Function '接口SqlConnection ----- 连接到SQL Server数据库(信任安全连接） 'DbName ---- 数据库名 'DataSource ----- 要连接的SQL实例的名字 '成功返回 True，否则返回 False Public Function SqlConnection(ByVal DataSource As String, ByVal DbName As String) As Boolean Dim ret As Boolean = True '如果数据库连接没有打开，尝试打开数据库连接 If Connection.State = ConnectionState.Closed Then '构造连接字串 ConnString = "Provider=SQLOLEDB.1;Initial Catalog=" & _ DbName & ";Data Source=" & DataSource & _ ";Integrated Security=SSPI;Persist Security Info=False;" Try Connection.ConnectionString = ConnString Connection.Open() Catch ex As Exception ret = False DisplayError(ex) End Try End If SqlConnection = ret '返回函数结果 End Function '接口OracleConnection ----- 连接到Oracle数据库(通过用户名和密码登录） 'UserId ---- 用户名 'Passord ----- 用户密码 'DataSource ----- 要连接的Oracle实例的名字或者网络地址 '如果是网络地址，IP地址后要加个端口号，如:190.190.200.100,1433 '成功返回 True，否则返回 False Public Function OracleConnection(ByVal DataSource As String, ByVal UserId As String, ByVal Password As String) As Boolean Dim ret As Boolean = True '如果数据库连接没有打开，尝试打开数据库连接 If Connection.State = ConnectionState.Closed Then '构造连接字串 ConnString = "Provider=OraOLEDB.Oracle;Data Source=" & DataSource & _ ";User Id=" & UserId & ";Password=" & Password & ";" Try Connection.ConnectionString = ConnString Connection.Open() Catch ex As Exception ret = False DisplayError(ex) End Try End If OracleConnection = ret '返回函数结果 End Function '接口OracleConnection ----- 连接到Oracle Server数据库(信任安全连接） 'DataSource ----- 要连接的Oracle实例的名字 '成功返回 True，否则返回 False Public Function OracleConnection(ByVal DataSource As String) As Boolean Dim ret As Boolean = True '如果数据库连接没有打开，尝试打开数据库连接 If Connection.State = ConnectionState.Closed Then '构造连接字串 ConnString = "Provider=OraOLEDB.Oracle;Data Source=" & DataSource & ";OSAuthent=1;" Try Connection.ConnectionString = ConnString Connection.Open() Catch ex As Exception ret = False DisplayError(ex) End Try End If OracleConnection = ret '返回函数结果 End Function '接口ExcelConnection ----- 连接到Excel工作表 'DbPath ----- .xls文件完整路径 '成功返回 True，否则返回 False Public Function ExcelConnetion(ByVal DbPath As String) As Boolean Dim ret As Boolean = True '如果数据库连接没有打开，尝试打开数据库连接 If Connection.State = ConnectionState.Closed Then '构造连接字串 ConnString = "provider=Microsoft.Jet.OLEDB.4.0; Data Source=" & DbPath & _ "; Extended Properties=Excel 8.0;" Try Connection.ConnectionString = ConnString Connection.Open() Catch ex As Exception ret = False DisplayError(ex) End Try End If ExcelConnetion = ret '返回函数结果 End Function Public Sub New() '初始化类的成员变量 Connection = New OleDbConnection Adapter = New OleDbDataAdapter Command = New OleDbCommand CommandBuilder = New OleDbCommandBuilder DeleteCommand = New OleDbCommand InsertCommand = New OleDbCommand SelectCommand = New OleDbCommand UpdateCommand = New OleDbCommand Command.Connection = Connection DeleteCommand.Connection = Connection InsertCommand.Connection = Connection SelectCommand.Connection = Connection UpdateCommand.Connection = Connection End Sub Protected Overrides Sub Finalize() '如果数据库处于连接状态，则关闭连接 If Connection.State = ConnectionState.Open Then Try Connection.Close() Catch ex As Exception DisplayError(ex) End Try End If End SubEnd Class
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